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Experimental Study Of The Influence Of An Electric Field On The Shape Of A Droplet
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Book Synopsis Experimental Study of the Influence of an Electric Field on the Shape of a Droplet by : Núria Romero Herreros
Download or read book Experimental Study of the Influence of an Electric Field on the Shape of a Droplet written by Núria Romero Herreros and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The electrowetting effect has emerged as an important research topic in recent years. Manipulation of droplets by electric fields has been extensively studied employing different setups, the most common being the configuration in which the electric field is created inside the droplet. However, such a configuration has been mostly employed using conductive liquids, whereas non-conductive droplets have been barely tested under the effect of an electric field using this setup. On the other hand, the influence of an electric field on the shape of a droplet has also been of considerable interest using an alternative configuration in which the electric field is applied between two electrodes with no contact with the drop – the Taylor cone configuration. However, the effects observed employing this last setup are rather different to those obtained using the aforementioned design. While the most important effect in those experiments in which the electric field is created inside the drop is the reduction of the contact angle, the main effect found using the second configuration is the droplet elongation in the electric field direction. In order to demonstrate if dielectric and almost perfectly wetting liquid droplets are affected in the same way as other fluids already tested, the effect of an electric field on the shape of an HFE-7500 droplet has been examined under two different experimental setups by means of interferometric techniques. For the setup where the internal electric field is created, no statistically relevant reduction was measured. Nevertheless, shape deviations have been found at a certain distance of the wire through which the electric field is applied. Moreover, the existence of such deviations depends strongly on the AC frequency. Regarding the second design, it should be mentioned that the initial parallel plate design was working correctly for water+salt droplets. However, no remarkable effects were observed applying strong electric fields of up to 10 kV/cm on HFE-7500 droplets. With the goal of increasing the field strength, two improvised configurations of a metal ring and a needle as a counter-electrodes have also been implemented. In these cases, a strong non-uniform electric field was created which did lead to shape changes of the droplets.
Book Synopsis Fluid Mechanics and Fluid Power (Vol. 1) by : Suvanjan Bhattacharyya
Download or read book Fluid Mechanics and Fluid Power (Vol. 1) written by Suvanjan Bhattacharyya and published by Springer Nature. This book was released on 2023-05-10 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the select proceedings of the 48th National Conference on Fluid Mechanics and Fluid Power (FMFP 2021) held at BITS Pilani in December 2021. It covers the topics such as fluid mechanics, measurement techniques in fluid flows, computational fluid dynamics, instability, transition and turbulence, fluid‐structure interaction, multiphase flows, micro- and nanoscale transport, bio-fluid mechanics, aerodynamics, turbomachinery, propulsion and power. The book will be useful for researchers and professionals interested in the broad field of mechanics.
Author :Arash Bateni Publisher :Library and Archives Canada = Bibliothèque et Archives Canada ISBN 13 :9780494028384 Total Pages :480 pages Book Rating :4.0/5 (283 download)
Book Synopsis Development of New Methodologies for the Study of Surface Tension and Contact Angle of Drops in an Electric Field [microform] by : Arash Bateni
Download or read book Development of New Methodologies for the Study of Surface Tension and Contact Angle of Drops in an Electric Field [microform] written by Arash Bateni and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2005 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the influence of an electric field on surface properties of liquids is of importance from both fundamental and practical standpoints. Charged or electrified drops currently play a key role in various applications, ranging from microfluidic devices to agricultural treatments. Nevertheless, the effects of the electric field on surface properties of drops are not understood yet, mainly due to the lack of reliable tools and methodologies to measure such effects.In this research, novel methodologies are developed that allow study of shape, surface tension, and contact angle of drops in the electric field: Automated Polynomial Fitting (APF) is a high-accuracy technique to determine contact angle of drops. It is applicable quite universally, and hence can be employed to measure the effect of the electric field on contact angles. Axisymmetric Drop Shape Analysis-Electric Fields (ADSA-EF) is a sophisticated drop-shape shape technique developed to study surface tension of drops in the electric field. ADSA-EF can also measure surface tensions in the absence of gravity; hence it is an ideal tool for microgravity research. Axisymmetric Liquid Fluid Interface-Electric Fields (ALFI-EF) is a side product of this research that can predict and simulate drop shapes in the electric field.In addition, two sets of ADSA-EF experiments were conducted in reduced-gravity using facilities provided by the Canadian Space Agency (CSA). In general, the measurements in the reduced-gravity condition agreed well with the previous ground-based measurements. The results suggested that gravity has no significant influence on the surface tension, as expected.Extensive experimental work was performed using the new methodologies. The correlation between thermodynamic contact angles and the electric field was determined for the first time, using APF. It was found that contact angle of polar liquids increases in the electric field (depending on the size of the molecules), whereas non-polar liquids remain unaffected by the field. The observations were interpreted in terms of liquid interfacial tensions, using thermodynamic relations. ADSA-EF experiments showed similar increase in liquid surface tensions; furthermore, they revealed a second-order correlation between the surface tension of conducting liquids and the electric field.
Book Synopsis A Theoretical, Numerical, and Experimental Study of Trapped Droplet Coalescence and Mixing, Passively and Under Electric Field by : Alireza Karbalaei Baba
Download or read book A Theoretical, Numerical, and Experimental Study of Trapped Droplet Coalescence and Mixing, Passively and Under Electric Field written by Alireza Karbalaei Baba and published by . This book was released on 2019 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Passive and electrically active coalescence and mixing of pairs of trapped squeezed nanodroplets were studied in this work. PDMS-glass microfluidic devices were designed and fabricated using multilevel photolithography technique. Flow-focusing method was used to generate nanoliter droplets of died glycerol inside oleic acid. The effect of factors such as flow rates and their ratio, interfacial tension, and viscosities on the size and frequency of droplet generation was studied and concluded by demonstrating the capillary number effect. A passive droplet trapping technique based on minimizing the surface energy of the droplets was employed to minimize the shear flow effects and increase the accuracy of passive coalescence and mixing experiments. The theoretical platform was presented for the analysis of this multiphase problem and a numerical solver was developed based on the lattice Boltzmann method to simulate the passive and electro-coalescence of the droplet pairs. Mixing of nanodroplets was studied by discussing the contributing mixing time scales and passive mixing of glycerol nanodroplets was experimentally realized. The rate of passive mixing percentage was derived by performing image processing and its exponential asymptotical behavior was presented. This study provided physical perspectives for droplet coalescence and mixing and can be extended in several numerical and experimental aspects.
Book Synopsis Second Microgravity Fluid Physics Conference by :
Download or read book Second Microgravity Fluid Physics Conference written by and published by . This book was released on 1994 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Droplet Microfluidics by : Eric Brouzes
Download or read book Droplet Microfluidics written by Eric Brouzes and published by MDPI. This book was released on 2021-05-06 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Droplet microfluidics has dramatically developed in the past decade and has been established as a microfluidic technology that can translate into commercial products. Its rapid development and adoption have relied not only on an efficient stabilizing system (oil and surfactant), but also on a library of modules that can manipulate droplets at a high-throughput. Droplet microfluidics is a vibrant field that keeps evolving, with advances that span technology development and applications. Recent examples include innovative methods to generate droplets, to perform single-cell encapsulation, magnetic extraction, or sorting at an even higher throughput. The trend consists of improving parameters such as robustness, throughput, or ease of use. These developments rely on a firm understanding of the physics and chemistry involved in hydrodynamic flow at a small scale. Finally, droplet microfluidics has played a pivotal role in biological applications, such as single-cell genomics or high-throughput microbial screening, and chemical applications. This Special Issue will showcase all aspects of the exciting field of droplet microfluidics, including, but not limited to, technology development, applications, and open-source systems.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1973 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microphysics of Clouds and Precipitation by : H.R. Pruppacher
Download or read book Microphysics of Clouds and Precipitation written by H.R. Pruppacher and published by Springer Science & Business Media. This book was released on 2010-06-25 with total page 975 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cloud physics has achieved such a voluminous literature over the past few decades that a significant quantitative study of the entire field would prove unwieldy. This book concentrates on one major aspect: cloud microphysics, which involves the processes that lead to the formation of individual cloud and precipitation particles. Common practice has shown that one may distinguish among the following addi tional major aspects: cloud dynamics, which is concerned with the physics respon sible for the macroscopic features of clouds; cloud electricity, which deals with the electrical structure of clouds and the electrification processes of cloud and precipi tation particles; and cloud optics and radar meteorology, which describe the effects of electromagnetic waves interacting with clouds and precipitation. Another field intimately related to cloud physics is atmospheric chemistry, which involves the chemical composition ofthe atmosphere and the life cycle and characteristics of its gaseous and particulate constituents. In view of the natural interdependence of the various aspects of cloud physics, the subject of microphysics cannot be discussed very meaningfully out of context. Therefore, we have found it necessary to touch briefly upon a few simple and basic concepts of cloud dynamics and thermodynamics, and to provide an account of the major characteristics of atmospheric aerosol particles. We have also included a separate chapter on some of the effects of electric fields and charges on the precipitation-forming processes.
Download or read book Canadian Journal of Physics written by and published by . This book was released on 2007 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Applied Chemistry and Chemical Engineering, Volume 3 by : A. K. Haghi
Download or read book Applied Chemistry and Chemical Engineering, Volume 3 written by A. K. Haghi and published by CRC Press. This book was released on 2017-12-22 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding mathematical modeling is fundamental in chemical engineering. This book reviews, introduces, and develops the mathematical models that are most frequently encountered in sophisticated chemical engineering domains. The volume provides a collection of models illustrating the power and richness of the mathematical sciences in supplying insight into the operation of important real-world systems. It fills a gap within modeling texts, focusing on applications across a broad range of disciplines. The first part of the book discusses the general components of the modeling process and highlights the potential of modeling in the production of nanofibers. These chapters discuss the general components of the modeling process and the evolutionary nature of successful model building in the electrospinning process. Electrospinning is the most versatile technique for the preparation of continuous nanofibers obtained from numerous materials. This section of book summarizes the state-of-the art in electrospinning as well as updates on theoretical aspects and applications. Part 2 of the book presents a selection of special topics on issues in applied chemistry and chemical engineering, including nanocomposite coating processes by electrocodeposition method, entropic factors conformational interactions, and the application of artificial neural network and meta-heuristic algorithms. This volume covers a wide range of topics in mathematical modeling, computational science, and applied mathematics. It presents a wealth of new results in the development of modeling theories and methods, advancing diverse areas of applications and promoting interdisciplinary interactions between mathematicians, scientists, engineers and representatives from other disciplines.
Book Synopsis Experimental Heat Transfer, Fluid Mechanics and Thermodynamics 1993 by : M.D. Kelleher
Download or read book Experimental Heat Transfer, Fluid Mechanics and Thermodynamics 1993 written by M.D. Kelleher and published by Elsevier. This book was released on 2012-12-02 with total page 1002 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers contained in this volume reflect the ingenuity and originality of experimental work in the areas of fluid mechanics, heat transfer and thermodynamics. The contributors are drawn from 27 countries which indicates how well the worldwide scientific community is networked. The papers cover a broad spectrum from the experimental investigation of complex fundamental physical phenomena to the study of practical devices and applications. A uniform outline and method of presentation has been used for each paper.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research and Technology 1995 written by and published by . This book was released on 1996 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of the Effect of Electric Fields on Droplet Coalescence by : Frederick Allen Pettersen
Download or read book A Study of the Effect of Electric Fields on Droplet Coalescence written by Frederick Allen Pettersen and published by . This book was released on 1962 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fusion Energy Update written by and published by . This book was released on 1981 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soviet Physics, Solid State written by and published by . This book was released on 1978 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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